std::stack::empty(3)

💖 std::stack::empty(3) 💖

okay so welcome to the std::stack::empty(3) page from the C++ Standard Libary manual — yes bestie, that spelling is exactly what the header says, and we’re keeping it.

💅 NAME 💅

std::stack::empty - std::stack::empty

(Yes, the name is the name. Iconic behavior. 🎀)

✨ Synopsis ✨

bool empty() const;                (until C++20)
[[nodiscard]] bool empty() const;  (since C++20)

Checks if the underlying container has no elements. Equivalent to return c.empty();.

🎀 Parameters 🎀

• (none) — literally none, bestie. no arguments, no stress. 💅

🌸 Return value 🌸

true if the underlying container is empty, false otherwise. fr fr.

🦋 Complexity 🦋

Constant. that’s the whole vibe. ✨

🔥 Example 🔥

       // Run this code

        #include <algorithm>
        #include <iostream>
        #include <stack>

        int main()
        {
            std::cout << std::boolalpha;

            std::stack<int> stack;

            std::cout << "Initially, stack.empty(): " << stack.empty() << '\n';

            stack.push(42);
            std::cout << "After adding elements, stack.empty(): " <<
       stack.empty() << '\n';
        }

🌈 Output 🌈

        Initially, stack.empty(): true
        After adding elements, stack.empty(): false

👑 See also 👑

• size — returns the number of elements (public member function)
• empty — checks whether the container is empty (C++17) (function template)

💖 cute sign-off: source/version is http://cppreference.com, and the date is 2024.06.10. periodt. 🫶